William, Duke of Brunswick-Grubenhagen

William I of Brunswick- Grubenhagen (* around 1298, † 1360 ) was Prince of Brunswick- Grubenhagen.

Life

He was the third son of Henry I., the strange ones and his wife Agnes, née Countess of Meissen. He joined with his brothers Henry II and Ernst I after the death of his father, in 1322, the rule in the Principality Grubenhagen to.

Since William was childless, was after his death, in 1360, the entire principality ruled Grubenhagen the older brother Ernst.